"Wow Twilight! Everything is so pretty!" Kate exclaimed as the train slowed to a stop near the Crystal Empire. Princess Celestia had sent Twilight a letter regarding important princess matters in the Crystal Empire. She have no idea what she has in store for her, but Twilight wasn’t going to do this alone. And Sam wanted to show his siblings the Crystal Empire.

"Welcome to the Crystal Empire..." Twilight smiled as they walked out of the train.

"Oh, everything is as beautiful and dazzling as before!" Rarity exclaimed.

As they were walking, Adagio spoke out, "You must be over the moon, Twilight."

"Oh, I am excited but... To be honest, I'm a little nervous too..."

"You're nervousited!" Pinkie Pie exclaimed. "It just makes you wanna jump up and down and yell 'YAY ME!'" She stops, "But it also makes you wanna curl up into a little ball at the same time...!" She says curling up into a ball and standing back up with a transforming sound effect. "We've all been there!"

"I'm there almost every day..." Fluttershy said looking away.

"You've got no reason to fear, Sparkle," Aria started, "Everything's gonna be just..."

"TWILIGHT!!" Rarity exclaimed running up to me. "Oh, sorry darling, but I just realized you aren't wearing your crown!... You haven't forgotten it back in Ponyville have you??"

"It's in my bag..." Twilight sighed, "I just feel a little uncomfortable wearing it. Plus I haven't really gotten used to these yet..." she said trying to fly but falling flat to the ground.

"You are a princess now Twilight, embrace it!" Rarity exclaimed. "I'm telling you, if I had a crown like that, I would never take it off. Why I'd sleep in the thing!"

Twilight and Sam rolled their eyes until Sam saw Emily going through Twilight’s bag. "Emily, what are you doing?" he then saw her pulling out Twilight’s crown.

She then placed it on Joe’s head with a goofy grin on her face. "All hail Princess Joe".

Everyone couldn't help but laugh. All but Joe, "Yes, ha, ha, but you're my little princess too," he said as his took it off and placed it on Emily’s head.

They then started to walk into the castle. As they did, Sam showed his siblings a few things in the castle. They just listened, excited to hear every word, and Emily secret placed Twilight’s crown on Sam’s head. Eventually they found their way into Princess Cadence's chamber. "Twilight!" She exclaimed hugging her sister-in-law. "I haven't seen you since the coronation!" She moved over to see Sam. "And it's wonderful to see you again as well Sa--" she stopped and noticed Sam was wearing Twilight’s crown. "Isn't that your mums crown?"

"Huh?" Sam explained as he took off his mother’s crown, then gave a look to his former babysitter who had a guilty expression on her face.

Celestia smiled walking up to them. "We have so much to discuss. But it can wait. You all look tired from your journey. Now off to bed, all of you."

They all bowed and turned walking toward their rooms. "I can't believe it’s so late already..." Twilight yawned. She looked at Sam who was struggling to keep his eyes open.

Sam, Sunset, Twilight and Spike all stayed in the same room. Twilight sighed placing the crown on her head.

"What's wrong Twilight?" Sunset asked.

"I don't know Sunset... I'm just worried I guess. Princess Cadence was given the Crystal Empire to rule over... What if now that I'm a princess Celestia would want me to lead a kingdom of my own!? Of our own!?"

"That. Would. Be. Awesome!" Spike and Sam exclaimed.

"No. It. Would. Not!" Twilight exclaimed rubbing her forehead. "Just because I have this crown and these wings, it doesn't mean I'll be a good leader."

"I think you would," Sam spoke out. "You're in charge of a lot of things at home."

"He's got a point." Sunset added and yawned. "But come on, we all need to get some shut-eye... Big day tomorrow." Twilight nodded as both her and Sunset got in the same bed and Sam got in his own. Twilight closed her eyes.... Trying desperately to get comfortable! "Just, tuck..." she said trying to fold her wings rolling around in bed. "Just trying to get comfortable...!" Twilight closed her wings and shut her eyes... Until they shot open again. "UGH!!"

“Twilight just relax yourself!” Sunset softly yelled.

Sam couldn't sleep. he was tired but he couldn’t get comfortable. He got up and tried to make the bed more comfortable. Suddenly he could hear the door slowly open and he ran back into bed before anyone could see him. Sam carefully took a peek at who came in. It looked like a pony with a cloak. He saw the pony slowly walk up to the bed and toward both Twilight’s and Sunset’s crowns. ‘What is she...’ he then saw her levitate the crowns and replace them with ones that looks the same! ‘She's stealing mum and aunt Sunset's crowns!!’ He then turned on the Omnitrix and chose Gomess. "Stop!!" he exclaimed shocking the intruder and waking everyone up.

Twilight yawned waking up and looked at the intruder in shock. "My crown! She's got our crowns!!" The intruder then ran out as Sam/Gomess, Twilight and Sunset ran after her. "Stop!! Thief!!" The others walked out of their rooms in confusion. "She's stolen our crowns!!" Sunset exclaimed as we all were now chasing after her. Henry transformed into Goldras and tried to catch her, but the intruder teleported I front of her, revealing that it was a midnight blue unicorn with deep purple and yellow mane and tail. She kept running as Sam and Twilight followed in aggravation. Twilight and Gomess then tackled the unknown unicorn into another room as the crown bounced off the walls and into a mirror. "What did you do with my crown!?"

"Sorry that it had to be this way, sister!" The intruder exclaimed teleporting in front of the mirror and jumping through it. Leaving everypony speechless.

"Who was that...?" Fluttershy asked.

"Princess Celestia!!" Twilight exclaimed and ran toward Celestia's room.

“Did anyone see her Cutie Mark?” Kate asked.

“it looked like Twilight’s star and Sunset’s sun but divided into two with a blackhole in between them”, Sam said, “And why did she say Twilight was her sister?”

"WHAT!!!" Celestia yelled very uncharacteristically of her. “Well it about time Twilight and Sunset you knew about your real origins.”

“What do you mean Princess?” Twilight asked confused.

Celestia then walked to a painting which told a story.

“Long, long ago Luna and I ruled together with a third celestial being. Her name was Princess Eclipse, Princess of the dawn and dusk. One day, during the time of Nightmare Moon’s imprisonment, the Devil Beast, Zaigorg and his demon Gorg clones attacked Equestria.”

“They were unstoppable but then Princess Eclipse did something heroic. She sacrificed herself for all of Equestria. Moments later three little fillies floated down from the sky, one was lavender with purple mane and tail, one was yellow with fiery mane and tail, and the third was dark blue with a deep Purple and orange mane and tail. They were Twilight Sparkle, Sunset Shimmer and Crepuscule.”

Everyone gasped in shock. Twilight and Sunset along with this Crepuscule character where once the same being.

“I gave Twilight to her now parents Nightlight and Twilight Velvet, Sunset to her now parents Flare Blitz and Sunny Day and decided to adopted Crepuscule myself. After time, Crepuscule grew more and more rebellious and she was given the nickname 'Divided Dusk' as she had half of both Twilight and Sunset's cutie marks, she also felt she was being isolated from me as I was busy with my Princess duties. Soon she ran away from me to an unknown world after almost hurting somepony and I scolded her for it. I just watched as my adopted daughter ran away, I hoped she'll come back in a change of heart, but that wasn't the case.”

Twilight was lose of word. Everyone else was shock after hearing this tale.

"But I don't understand..." Sunset started. "Where did she go? Where did she take our crowns??"

Celestia lead her into a different room. "You'll soon know more about this place than even I do." She said walking into the room with the mirror, Luna already there.

"This is no ordinary mirror. It is a gateway into another world. A gateway that opens once, every thirty moons."

“Sparkly!” Pinkie exclaimed placing her hoof on the mirror while Luna slowly moved her away with a mused look on her face.

“It has always been kept in the throne room of Canterlot Castle.” Luna continued. “But when Princess Cadence took over the Crystal Empire, we sent it here for her to watch over.”

Celestia sighed. "Twilight… you and Sunset must use the mirror to go into this other world and retrieve your crowns. Without them, the other elements of harmony have no power and Equestria is left without two of its most important means of defence.”

"Your crowns does not belong in the place Crepuscule now calls home." Luna said. “And in her possession your element of harmony will no doubt be used to bring harm to the inhabitants of this other realm. They will not have the power to defend themselves.”

"Do you understand the importance of your task?" Celestia asked.

"Of course," Twilight and Sunset answered.

"Good... Then you must go at once." Twilight sighed as she was about to walk in through the portal.

"Whoa, whoa, whoa!" Rainbow Dash cut in front of her. "If she's goin, we're goin with her! Right girls?"

"Ooohhh! I'm so nervousited!!" Pinkie exclaimed.

"You do realize that's not a real word, right?" Applejack asked.

Twilight just smiled until... "I'm afraid I can't let you go." Celestia spoke out. She then explained the consequences of Twilight’s friends going.

Twilight sighed as she looked back at all of us and slowly walked through the mirror followed by Sunset... But Sam and Spike grew nervous and ran through after them. "Spike!!" Everypony exclaimed... "SAM!!" They exclaimed as they followed them.

"Ugh..." Twilight groaned opening her eyes.

"Uh... Twilight?"

"Huh?" she said looking around. "Spike...? You're not supposed to--" she stopped mid-sentence when she saw him. "Spike... Are you a dog??"

"I.. Think so..." Spike said looking at himself. "But... You may want to look at yourself...!"

Twilight slowly raised her... Hands!? she screamed at the top of her lungs but quickly covered her mouth. Twilight just kept examining her body in a sort of panic. “W... what happened!? Why am I a human!?” Suddenly there were two more screams behind the pond… “That sounded like…” Twilight slowly got up trying to keep her balance. “Oh… my…” she looked down only to find a vanilla coloured girl with brown hair and yellow streaks. She looked about the same size as herself. “S… Sunset…?”

“Huh?” She said looking up at Twilight in shock. “You’re human now!?”

“Y-you’re a human too!” Twilight exclaimed back.

“Huh!?” Sunset exclaimed examining her own body now. “But… how!?”

“Oh quiet your wining!” replied Sam’s voice, Twilight and Sunset looked and saw Sam was still human. He started to look around, “This pond looks rather familiar somehow.”

“Sam?” Twilight asked confused, “How are you still human?”

“Maybe his Omnitrix has something to do with it,” Spike wisely stated.

Sunset noticed the colour seemed to drain from Sam’s face, “Sam what’s wrong?”

“I know where we are,” Sam said quietly, “this is my school. This is my hometown. This is Earth.”

To be continued…

here's chapter 16 done.
this part of the story is inspired by the Equestria Girls movie however being on a parallel world it's the human world Sam and his siblings came from.
To all you Ultraman fans Gorg Dorako and Gorg Silvergon where meant to be in the Ultraman X movie but were cut but I have made them myself.
if you want to know what the character look like know:
Twilight

Sunset

and Crepuscule

next chapter: Sam returns to his house and re-unites with his old friends